Langkawi is an archipelago of 104 islands in the Andaman Sea, some 30km off the mainland coast of north-western Malaysia. The islands are a part of the state of Kedah, which is adjacent to the Thai border. By far the largest of the islands is the eponymous Langkawi Island with a population of some 64,792, the only other inhabited island being nearby Tuba Island. Langkawi is also an administrative district with the town of Kuah as largest town. Langkawi is a duty-free island.